Patent · US Active

Process for the preparation of styrenic polymers having an improved color stability

US11059931B2 · kind B2 · utility

0Cited by

3References

13Claims

0Family size

Assignee

INEOS STYROLUTION GROUP GMBH · DE

Inventors

Michiel VERSWYVEL · Mechelen, BE
Norbert Niessner · Friedelsheim, DE
Rainer Moors · Schifferstadt, DE
Konrad Knoll · Mannheim, DE
Bart Van-Den-Bossche · Bornem, BE
Christof Camerlinck · Sleidinge, BE

Key dates

Filing date	Aug 29, 2018
Grant date	Jul 13, 2021
Priority date	—
Expiry date	Aug 29, 2038

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01J2219/00164
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Process for the preparation of styrenic polymers having an improved color stability by anionic polymerization wherein the obtained terminated polymer solution is fed to a dispersing device to which water is added, fed to a buffer vessel and then is impregnated in a static mixer by addition of further water, carbon dioxide and one or more stabilizers.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.